@amszmidt I'm assuming that gnu.org/philosophy/free-sw.html has been an up-to-date version of the FSD since that page was created.
https://web.archive.org/web/19990224104902/http://www.gnu.org:80/philosophy/free-sw.html
https://web.archive.org/web/19990430060825/http://www.gnu.org/philosophy/free-sw.html
If you have further historical insight, I would love to hear it.
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